Error not loading the original image when the locale translation markdown page does not exist

[hochan222]

Summary

If you load the image file used in that page without a translated page, an error will occur and the page will not be displayed. Even if there are no translation or grammar problems on the page where the error occurred.

There may be cases of using images from untranslated pages(
When it is not in the translated-content repo, but exists in the content repo) other than the current example, so it seems necessary to load the images of the page properly even if the translated page does not exist.

URL

Currently, all Korean pages have been translated, so they must be reproduced locally. I'll explain how to reproduce in Reproduction steps.

• https://developer.mozilla.org/ko/docs/Web/JavaScript/Reference/Global_Objects/Set
• https://developer.mozilla.org/ko/docs/Web/JavaScript/Reference/Global_Objects/Set/intersection

Reproduction steps

1. yarn start
2. Check "slug: Web/JavaScript/Reference/Global_Objects/Set" markdown file. (The page looks normal.)
3. Add a ### Set composition section.

Section to add

### Set composition

The `Set` object provides some methods that allow you to compose sets like you would with mathematical operations. These methods include:

<table>
  <thead>
    <tr>
      <th scope="col">Method</th>
      <th scope="col">Return type</th>
      <th scope="col">Mathematical equivalent</th>
      <th scope="col">Venn diagram</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>{{jsxref("Set/difference", "A.difference(B)")}}</td>
      <td><code>Set</code></td>
      <td><math display="inline"><semantics><mrow><mi>A</mi><mo>∖</mo><mi>B</mi></mrow><annotation encoding="TeX">A\setminus B</annotation></semantics></math></td>
      <td style="margin:0;padding:0"><img src="difference/diagram.svg" alt="A Venn diagram where two circles overlap. The difference of A and B is the part of A that is not overlapping B." style="margin:0;border:0;border-radius:0" width="200" /></td>
    </tr>
    <tr>
      <td>{{jsxref("Set/intersection", "A.intersection(B)")}}</td>
      <td><code>Set</code></td>
      <td><math display="inline"><semantics><mrow><mi>A</mi><mo>∩</mo><mi>B</mi></mrow><annotation encoding="TeX">A\cap B</annotation></semantics></math></td>
      <td style="margin:0;padding:0"><img src="intersection/diagram.svg" alt="A Venn diagram where two circles overlap. The intersection of A and B is the part where they overlap." style="margin:0;border:0;border-radius:0" width="200" /></td>
    </tr>
    <tr>
      <td>{{jsxref("Set/symmetricDifference", "A.symmetricDifference(B)")}}</td>
      <td><code>Set</code></td>
      <td><math display="inline"><semantics><mrow><mo stretchy="false">(</mo><mi>A</mi><mo>∖</mo><mi>B</mi><mo stretchy="false">)</mo><mo>∪</mo><mo stretchy="false">(</mo><mi>B</mi><mo>∖</mo><mi>A</mi><mo stretchy="false">)</mo></mrow><annotation encoding="TeX">(A\setminus B)\cup(B\setminus A)</annotation></semantics></math></td>
      <td style="margin:0;padding:0"><img src="symmetricDifference/diagram.svg" alt="A Venn diagram where two circles overlap. The symmetric difference of A and B is the region contained by either circle but not both." style="margin:0;border:0;border-radius:0" width="200" /></td>
    </tr>
    <tr>
      <td>{{jsxref("Set/union", "A.union(B)")}}</td>
      <td><code>Set</code></td>
      <td><math display="inline"><semantics><mrow><mi>A</mi><mo>∪</mo><mi>B</mi></mrow><annotation encoding="TeX">A\cup B</annotation></semantics></math></td>
      <td style="margin:0;padding:0"><img src="union/diagram.svg" alt="A Venn diagram where two circles overlap. The symmetric difference of A and B is the region contained by either or both circles." style="margin:0;border:0;border-radius:0" width="200" /></td>
    </tr>
    <tr>
      <td>{{jsxref("Set/isDisjointFrom", "A.isDisjointFrom(B)")}}</td>
      <td><code>Boolean</code></td>
      <td><math display="inline"><semantics><mrow><mi>A</mi><mo>∩</mo><mi>B</mi><mo>=</mo><mi>∅</mi></mrow><annotation encoding="TeX">A\cap B = \empty</annotation></semantics></math></td>
      <td style="margin:0;padding:0"><img src="isDisjointFrom/diagram.svg" alt="A Venn diagram with two circles. A and B are disjoint because the circles have no region of overlap." style="margin:0;border:0;border-radius:0" width="200" /></td>
    </tr>
    <tr>
      <td>{{jsxref("Set/isSubsetOf", "A.isSubsetOf(B)")}}</td>
      <td><code>Boolean</code></td>
      <td><math display="inline"><semantics><mrow><mi>A</mi><mo>⊆</mo><mi>B</mi></mrow><annotation encoding="TeX">A\subseteq B</annotation></semantics></math></td>
      <td style="margin:0;padding:0"><img src="isSubsetOf/diagram.svg" alt="A Venn diragram with two circles. A is a subset of B because A is completely contained in B." style="margin:0;border:0;border-radius:0" width="200" /></td>
    </tr>
    <tr>
      <td>{{jsxref("Set/isSupersetOf", "A.isSupersetOf(B)")}}</td>
      <td><code>Boolean</code></td>
      <td><math display="inline"><semantics><mrow><mi>A</mi><mo>⊇</mo><mi>B</mi></mrow><annotation encoding="TeX">A\supseteq B</annotation></semantics></math></td>
      <td style="margin:0;padding:0"><img src="isSupersetOf/diagram.svg" alt="A Venn diagram with two circles. A is a superset of B because B is completely contained in A." style="margin:0;border:0;border-radius:0" width="200" /></td>
    </tr>
  </tbody>
</table>

To make them more generalizable, these methods don't just accept `Set` objects, but anything that's [set-like](#set-like_objects).

4. Remove "slug: Web/JavaScript/Reference/Global_Objects/Set/intersection" markdown files(or folder) for pages in Korean locale(or other locale).
5. Check "slug: Web/JavaScript/Reference/Global_Objects/Set" markdown file. (Error)

Expected behavior

set page view

Actual behavior

Error: 500 on /ko/docs/Web/JavaScript/Reference/Global_Objects/Set/index.json: TypeError: Cannot read properties of undefined (reading 'url')

Device

Laptop

Browser

Chrome

Browser version

Stable

Operating system

Mac OS

Screenshot

No response

Anything else?

No response

Validations

• I have read the Community Participation Guidelines.
• I have verified that there isn't already an issue that reports the same bug to avoid creating a duplicate.
• I have checked that this is a concrete bug. For Q&A open a GitHub Discussion.